Sato K, Tsutsumi H, Htay H H, Tamaki K, Okajima H, Katsumata Y
Department of Legal Medicine, Nagoya University School of Medicine, Japan.
Forensic Sci Int. 1990 Mar;45(1-2):27-38. doi: 10.1016/0379-0738(90)90218-n.
Uric acid (UA) and urea nitrogen (UN) were determined in urinary stains and the UA/UN x 20 values were calculated. The values in human urinary stains were 1.11-4.21, while those in other mammals except some of chimpanzees, were under 0.7, and those in fecal stains of birds were over 80. Most of the stains of other human body fluids or plant juices tested contained neither UA nor UN, and some contained one, but never the other. Ascorbic acid (AS) of up to 100 mg/dl in urine did not interfere with UA determination when dried human urinary stains were analyzed. It was also found that the contents of UA were very low at the peripheral parts of urinary stains. The present results indicate that the quotient UA/UN is useful for identification of human urinary stains in forensic practice provided that the peripheral part of the stain is not used.
测定了尿渍中的尿酸（UA）和尿素氮（UN），并计算了UA/UN×20的值。人类尿渍中的该值为1.11 - 4.21，而除部分黑猩猩外的其他哺乳动物尿渍中的该值低于0.7，鸟类粪便污渍中的该值超过80。所检测的大多数其他人体体液或植物汁液污渍既不含UA也不含UN，有些只含其中一种，但不会同时含有另一种。当分析干燥的人类尿渍时，尿液中高达100mg/dl的抗坏血酸（AS）不会干扰UA的测定。还发现尿渍周边部分的UA含量非常低。目前的结果表明，只要不使用污渍的周边部分，UA/UN商值在法医实践中可用于鉴定人类尿渍。
